Features:Made of high quality 304 stainless steel, rust and corrosion resistant, widely used in industryThis set is organized by size in a transparent storage case for quick access and protection.There are 6 different sizes in one set to meet your various needs.Ideal for use by a variety of workers and repairmen from plumbers to assemblymen both professional and amateur, even DIYers can opt to use it.Similar to countersunk head screws, the nail head is embedded in the machine parts. Generally used in various machine tools and accessoriesSpecification:Material: 304 stainless steelWeight: Approx.556g/19.6ozSize:1/4-20*1/2 10pcs1/4-20*5/8 10pcs1/4-20*3/4 10pcs1/4-20*1 10pcs1/4-20*1-1/8 10pcs1/4-20*1-1/4 10pcs1/4-20*nut 30pcsPackage list:1/4-20*1/2 10pcs1/4-20*5/8 10pcs1/4-20*3/4 10pcs1/4-20*1 10pcs1/4-20*1-1/8 10pcs1/4-20*1-1/4 10pcs1/4-20*nut 30pcsNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..